From 357b9784b79924a31ccded5d9a0c688f48cc28f2 Mon Sep 17 00:00:00 2001 From: Josef Bacik Date: Thu, 26 Jan 2012 15:01:11 -0500 Subject: Btrfs: make sure a bitmap has enough bytes We have only been checking for min_bytes available in bitmap entries, but we won't successfully setup a bitmap cluster unless it has at least bytes in the bitmap, so in the common case min_bytes is 4k and we want something like 2MB, so if there are a bunch of bitmap entries with less than 2mb's in them, we'll search all them anyway, which is suboptimal. Fix this check. Thanks, Signed-off-by: Josef Bacik Signed-off-by: Chris Mason --- fs/btrfs/free-space-cache.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'fs') diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c index efe20032e4a..6e740693234 100644 --- a/fs/btrfs/free-space-cache.c +++ b/fs/btrfs/free-space-cache.c @@ -2475,7 +2475,7 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group, } list_for_each_entry(entry, bitmaps, list) { - if (entry->bytes < min_bytes) + if (entry->bytes < bytes) continue; ret = btrfs_bitmap_cluster(block_group, entry, cluster, offset, bytes, cont1_bytes, min_bytes); -- cgit v1.2.3